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Public Information Statement
National Weather Service Mobile AL
912 AM CDT Tue Apr 21 2020

To:        Subscribers:
           -NOAA Weather Wire Service
           -Emergency Managers Weather Information Network
           -NOAAPort
           Other NWS Partners and NWS Employees

From:      Michael Angove, Acting Chief
           Marine, Tropical and Tsunami Services Branch

Subject:   Hurricane Threats and Impacts (HTI) Mosaic Testing on
           or about April 21, 2020

The NWS Weather Forecast Office (WFO) in Honolulu and WFOs in the
NWS Southern Region and in the NWS Eastern Region will commence 
with Hurricane Threats and Impacts (HTI) threat grid mosaic 
testing on Tuesday, April 21. Wednesday, April 22 has been 
designated as the backup test date in the event that testing 
cannot be conducted on the 21st.

Testing will begin at approximately 1500 UTC. Test activities 
will take approximately 1 hour; however, NWS dissemination systems
may take up to an hour and a half to purge all test data. All 
test data is expected to be cleared by 1730 UTC.

For the test, HTI grids will be created for Hurricane Wind 
Threat, Hurricane Storm Surge Threat, Hurricane Flooding Rain 
Threat, and Hurricane Tornado Threat. These grids are sent to the 
National Digital Forecast Database (NDFD) and can be seen on the 
NDFD web viewer at:
https://digital.weather.gov

The Product Description Document for these threat grids can be 
found here:
https://www.weather.gov/media/srh/tropical/PDD_HTI.pdf

HTI grids are created by WFOs for their county warning area and 
mosaicked together to form a more geographically consistent 
depiction of the threat posed by hurricane hazards. The HTI 
mosaics can be found in kml format at:
https://weather.gov/hti

When populated HTI grids are posted, they also can be found on 
the WFO Tropical Web Portal page linked below under the “Threats
and Impacts” tab:
https://www.weather.gov/srh/tropical

NWS WFOs participating in this HTI Mosaic Test are listed below 
by NWS Region:

NWS Eastern Region:
Blacksburg/Roanoke, VA (RNK)
Caribou, ME (CAR)
Charleston, SC (CHS)
Columbia, SC (CAE)
Greenville-Spartanburg, SC (GSP)
Mount Holly, NJ (PHI)
Newport/Morehead City, NC (MHX)
New York, NY (OKX)
Raleigh-Durham, NC (RAH)
Sterling, VA (LWX)
Wakefield, VA (AKQ)

NWS Pacific Region:
Honolulu, HI (HFO)

NWS Southern Region:
Atlanta, GA (FFC)
Austin-San Antonio, TX (EWX)
Birmingham, AL (BMX)
Brownsville, TX (BRO)
Corpus Christi, TX (CRP)
Fort Worth, TX (FWD)
Jacksonville, FL (JAX)
Key West, FL (KEY)
Lake Charles, LA (LCH)
Melbourne, FL (MLB)
Miami, FL (MFL)
Mobile, AL (MOB)
New Orleans, LA (LIX)
Tallahassee, FL (TAE)
Tampa Bay Area, FL (TBW)

Periodic software and hardware testing in preparation for 
hurricane events will continue during the remainder of 2020.

For more information, please contact:

 Jason Beaman
 Warning Coordination Meteorologist
 National Weather Service Office
 Mobile, AL 36608
 jason.beaman@noaa.gov

 251-633-6443

National Public Information Statements are online at:
https://www.weather.gov/notification/

$$